Celluloid strip holder for dental work



' Feb. 12, 1935. A BANDMAN 1,990,889

CELLULOID STRIP HOLDER FOR DENTAL WORK Filed Aug. 24, 1954 ATTORNEY.

INVENTOR.

Patented Feb. 12, 1935 UNITED STATES: PATENTfoFFmE CELLULOID STRIP HOLDER on DENTAL 1 -wom I Albert Bandman, New York, .Y. F V I I Application August 24, 1934, Serial No. 741,225

3 Claims. (01. 32-63) This invention relates to dental devices for holding a strip of celluloid about a tooth after it has been filled with a porcelain or cement filling.

r ()ne object of the invention is to provide such 9 a holder which will securely hold a celluloid strip or tape about a filled tooth without it being held in the hands of either the dentist or patient, or the dentists assistant. a

In filling teeth with either porcelain or cement it is very important that the filling be tightly pressed into thecavity so as to produce a smooth even filling to prevent air leakage and consequent decay of the tooth.

At the present time dentists make use of a celluloid strip about four inches in length for this purpose which they insert between the filled tooth and the next adjacent teeth on each side of the filled tooth. In carrying out this operation it is necessary that the dentist hold each end of the celluloid strip between the fore finger and thumb of each hand, inserting the fingers of one hand into the patients mouth, holding it firmly and with the other pulling and holding the strip in place for a period of about three minutes. Some dentists let the patient hold the strip after it is in place. There is no doubt that in such cases the strip is never held either steadily (any slight movement will distort the filling) nor with sufficient pressure. In any case three minutes is a long time to hold such a strip and it is tiresome to the doctor, his assistant, or patient. In order to eliminate this inconvenience and objectionable feature, and to assure a steady and firm pressure 35 on the filling for the full period necessary for the setting of the porcelain or cement filling, I have perfected my new strip holder.

Another object is to produce a device of the character described in which themaximum simplicity of construction and operation is secured.

Other objects and advantages will appear as the nature of the improvements is better understood, the invention consisting substantially in the novel arrangement and co-relation of parts herein fully described, and illustrated in the accompanying drawing, wherein similar reference characters are used to describe corresponding parts throughout the several views, and then finally pointed out and specifically defined and indicated in the appended claims.

The disclosure made the basis of exemplifying the present inventive concept suggests a practical embodiment thereof, but the invention is not to be restricted to the exact details of this disclosure, and the latter, therefore, is to be understood from an illustrativefrather than a restrictive standpoint.

The inventive idea involved is'capable of receiving a variety of mechanical expressions, one of which, for the purpose of illustration, isshown in the accompanying drawing, in which Figure 1. is a view in front elevation showing my new strip holder in position when holding a strip about a filled tooth. Figure 2 is a sectional view taken on line 2-2 Fig. 1. Figure 3 is a similar view to Fig. 2 but showing the strip inserted between the teeth prior to the tightening of. the strip about the filled tooth; Figure 4, is a perspective view of the holder with a strip of celluloid inserted therein; Fig. 5 is a fragmental perspective View of a modified form of the stop rod; Fig. 6 is a side view in elevation of a further modified form of the invention; Fig. '7 is a sectional view taken on line '77 Fig. 6; Fig. 8 is fragmental sectional view of the bottom or toothed end of the tubular sleeve, and Fig. 9 is a fragmental sectional view of the lower or toothed end of the loop holding rod.

Referring now to the drawing in detail, 5 and 6 indicate a pair of tubular sleeves connected at their bottom ends by a strip or bridge '7 to form a frame 1. Within the sleeve 5 there is mounted a rod 8 which at its upper end is providedwith a slot 9 adapted to frictionally hold the ends of a loop 10 formed of a strip of celluloid or other suitable material, the fit between the bore of the tube 5 and rod 8.being such that the said rod may be rotated in the tube but not so loose that the rod will readily fall out of the said bore.

In Figures 1 to 3, I have illustrated several front teeth one of which being indicated at 12 and as having a porcelain filling 13 therein. After the tooth is filled the loop 10 is inserted about the said tooth as shown in Fig. 3, and the rod 8 is rotated by means of a knob 15 in the direction of the arrow 14 until the rear end of the loop is wound about the tooth 2 as shown in Figures 1' and 2. Prior to the winding of the strip or loop 10 care is taken that the top of the stop rod 16' which is mounted on the sleeve 6 is below the cutting or biting edge of the tooth 1'7 adjoining the tooth being filled or in the space between the adjoining tooth 17 and its neighbor. After the loop is wound as tight as need be the rod 16'is slipped behind the tooth 17 or in the space between' the two adjoining teeth, and pushed upwardly by means of a button or flange 18 provided at the lower end thereof. It is to be understood that the rod 16 has a similar fit in the tube Gas the rod 8 has in the tube 5. The holder and loop will remain firmly in. place as long as necessary without it being held in place by either the .dentist, nurse or patient.

, In Fig. 5, I have shown a modified fromof the loop of celluloid about the tooth that is being.

filled. c In Figs. 6 to 9, I have illustrated. a further modified form of the invention wherein I employ but alsing-lepsleeve 5a in which there is rotatably' mounted the loopholding rod 8. Secured to the said sleeve 5a there is, a slideway" 2 5 in which there is slidably mountedaslide, 26 carryingza stop plate'26a. I

*The rod 8' in this form of the invention is provided at the bottom thereof with a knob or button 27, provided with an annular wall 28 having teeth 29 whic h may be brought into mesh with teeth 30 atthe lower end of the tubular "sleevefi a. The teeth, 29 and 30 are brought into engagement after the tape. is fully wound up andprevent any fur} ther rotation of the rod 8 inthe sleeve 5a. In

thismodification of theinvention, the stop plate 26a may 'bebrought into engagement withthe rear of the tooth being filled where there is no adjacent tooth. After the slide 26 is inserted into the slideway 25, the ends of thesaid slideway may be slightly squeezed togetherto prevent the 1,990,889 said slide and stop from falling out thereof. If,

desired, other means maybe provided for this purpose.

Not only is the holder a laborsaving device, but it also saves material, as the length of the strip used to form the loop 10 is but two inches long, which is a saving of fifty percent of the celluloid now being used.

Froznthe foregoing it will be seenthat l'. have provided a simple inexpensive, yet eflicientdental celluloid strip holder.

Having described my invention what I claim new and desire to secure by Letters Patent is:

1. A dental tool, comprising a sleeve, anormally rotatably operable slotted loop holder therein, means for preventing relative rotation between the loop holder-and sleeve after the loop holder is fully ,operated,1and,a slidable. stop plate carried by the sleeve.

'2. A dental tool, comprising a sleeve, a normally rotatable slotted loop holder therein, a slidable stop plate carried bythe sleeve, teeth on'the sleeve, and a toothed member on the loop holder for engagement with theteeth'on the sleeve when desired.

3. A dental tool, comprising a sleeve, a' normally rotatable loopholding rodtherein-havin'g a slot at one end thereof, a toothed member at its opposite end, teeth on the sleeve for engagement with the'said toothed member to prevent rotation between the said sleeve and rod, and aslidable stop carried by the sleeve. ALBERT BANDMAN. 

